Electric controller.



N0 MODEL.

PATENTBD NOV. 24, 1903 A. SUNDH. ELECTRIC CONTROLLER.

APPLICATION FILED AUG. 5, 1903.

2 SHEETS-SHEET l.

mzwonms PETERS co. PHOTO-Urns" WASHINGTON, u c

PATENTED NOV. 24; 1903.

A. SUNDH.

ELECTRIC CONTROLLER.

APPLIUATION FILED AUG. 5, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

TIGB.

'MEr EIQ BQ EEE- B L I l FIGS.

TIGAQ INVENTQR ATTORNEY WITNESSES:

UNITED STATES Patented November 24, 1903.

PATENT Curios...

ELECTRIC CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 744,818, dated November 24, 1903.

Application filed August 5,1903. Serial No. 168,265. (No m l- To all whom, it may concern.-

Be itknown that LAUGUsT SUNDH,0E Yonkers, Westchester county, New York, have invented a new and useful Improvement in Electric Controllers, of which the following is a specification.

The invention relates to an electric controller more especially intended for use with an electric motor.

The invention consists in the combination of an electromagnetically-controlled circuitcloser, a device for mechanically preventing the movement of said circuit-closer to close circuit, and electromagneticallycontrolled mechanism for actuating said device to permit said circuit-closer to operate; also, in means for positively moving said circuitcloser toward circuit-closing position; also, in the combination of solenoid, core, and movable cani bearing on a lateral projection of said core and controlling the movementthereof; also, in the construction of the laterallymoving locking-bar and associated parts; also, in the combination, with the mechanism of 'the apparatus, of a nonmagnetic body moved thereby in a magnetic field and the devices whereby said field is varied in strength for the purposes set forth; also, in the combination of a plurality of circuitclosers and means for releasing the same successively from a locking device; also, in the construction with an electric motor of means for first establishing branch circuit through the field of said motor and through a series of resistances and the armature, and means for cutting said resistances successively out of said armature branch; also, in the various combinations and instrumentalities more particularly hereinafter claimed.

In the accompanying drawings, Figure 1 is a general view showing the Various circuit connections and also the main solenoid 1 in vertical section. Fig. 2 is a detailed View showing two of the circuit-closing solenoids in vertical section and also illustrating the position of the bar 10 after the same has been moved to permit the first of said solenoids to close circuit. Fig. 3 is a top view. Fig. a is a section on the line a ct,Fig. 5 is a section on the line b b, Fig. 6 is a section on the line 0 c, and Fig. 7 is a section on the line 01 d, of Fig. 1.

Similar letters and numbers of reference indicate like parts.

l is the main solenoid, supported on the back plate 22, and 2 is its core. Said core contains an open air-duct 3, provided at its upper end with a ball-valve 1. When the so lenoid attracts said core to raise the same, said ball-valve closes; but when the core is released said valve is opened by the air-pressure in the duct 3, thus allowing air freely to enter into the interior of the solenoid. The core is thus permitted to fall quickly. The movement of the core when drawn upward by the solenoid may be regulated by the split hollow screw 5. By adjusting the position of said screw a more or less large opening for air to escape from the interior ofthe solenoid is provided. Said upper movement is also controlled by the copper disk 18, hercinafter described. The solenoid-core 2 has a downwardly-extending projection 6, one side of which is flat and bears against the stationary guide-roller 7. The other side has rack-teeth to engage with pinion 8. Said pinion 8 is fast on the shaft of alarger pinion 9, which engages with rack-teeth on the lower side of a laterally-movable bar 10. Said bar 10 has a slot 11, which receives the rollers 12 and 13, which are pivoted on the back plate 22. The pinion 9 also engages with a pinion 14, fast on a sleeve 15 on shaft 16. (See Figs. 5 and 7.) Said sleeve also carries a pinion 17. Loose on shaft 16 is a copper disk 18, and on said disk is a pawl 19, constructed to engage with pinion 17. The disk 18 is disposed between the pole-pieces 20 of an electromagnet 21 and cooperates with said magnet to form an electrical retarding device for the mechanism of the apparatus, as hereinafter described. Magnet 21 is supported on bracket 23 on the back plate 22. An arm 24; on said plate carries an elastic cushion 25, against which the lower end 01' core prolongation 6 rests when said prolongation is in its lowest position. Also supported on back plate 22 are four solenoids 26 27 28 29, each having a cylindrical core provided with a roller 30, which is received in the slot 11 of bar 10. Each solenoid-core carries a circuit-closing bar 81. Above each circuit-closing bar 31 are pairs of circuit-terminals 82 33 34s- 35.

The electric motor to be controlled is Top resented at 36, and resistances are shown at 38 39 40.

The circuits are as follows, it being assumed that the solenoids 26 27 28 29 have all raised the bars 31 to establish contact at the terminals 32 33 34 35 and that the hand-switch 41 is closed: From positive main terminal to point 46. Here the circuit divides. One branch proceeds to switch 41 by wire A, to solenoids 26 27 28 29, to main solenoid 1, to switch 41, and to negative main terminal. The other branch proceeds by wire B to terminals 32, by wire G (connected between one contact of terminal 32 and the adjacent contact of terminal 33) to motor-fields 37 at 44, and so to negative main terminal. The terminals 33 34 35 being closed, the circuit also proceeds in branch through said terminals and circuit-closing bars 31 by wire D to point 45 and thence by wire H through armature of motor 36 to electromagnet 21, and so to negative main terminal. The wire F connects at one end to the adjacent contacts of terminals 33 and 34 and at the other end to point 43 between resistances 38 and 39. The wire E in like manner connects at one end to the adjacent contacts of terminals 34 and 35 and at the other end to point 42 between resistances 39 40.

The operation of the device is as follows, all parts being normally in the positions shown in Fig. 1: When the hand-switch 41 is closed, main solenoid 1 draws up its core, and thus through the rack-and-pinion mechanism described causes bar 10 to move to the left of Fig. 1. The width of the left-hand part at of the slot 11 in bar 10, which normally receives the rollers 30,is only sufficient to receive said rollers, so that with the parts as shown in Fig. 1 the bar 10 holds and locks the cores of solenoids 26 to 29 in their lowermost positions, thus preventing the solenoids from lifting their cores. The width of the right-hand part at of the slot 11 is, however, considerably in excess of the diameter of rollers 30. The upper inner edge of slot 11 between the parts an 7t is inclined, as shown at 0, while between the lower inner edges there is a shorter incline at 1). As the bar 10 moves to the left of Fig. 1 the incline o and then the wider part 11 of slot 11 come over the roller 30 of solenoid 26, so that this solenoid may now raise its core and close circuit at the terminals 32, as shown in Fig. 2. The branch circuit by wire 13 now proceeds through said terminals 32 by wire G to point 44 and divides, part passing to negative terminal through field 37 and part passing through the resistances 38 39 40 to point 45, wire H, motor 36, and magnet 21. The motor now starts, obviously with all of the resistances in the armature-circuit. Meanwhile through the gearing and pawl described the upwardly-moving core 2 of main solenoid 1 sets in rotation the copper disk 18, which intersects the field of the now-energized magnet 21. The well-known effect of the field is to retard the movement of rotation of the disk, and hence any sudden starting movement of the solenoid-core 2 is prevented. As the bar 10 continues to move to the left the incline 0 comes over the roller 30 of the suc eeeding solenoid 27, and in the manner already described circuit becomes closed at the terminals 33 as well as at terminals 32. The current then passes by wire G through the motor-field 37 to negative terminal and by wire F to point 43 and through resistances 39 and 40 to motor-armature, the net effect being the cutting out of resistance 38. The motor speed then increases, and the field of magnet 21 becomes stronger,thus correspondingly retarding the revolutions of disk 18. In the same way circuit becomes closed at terminal 34 when resistances 38 and 39 are cut out, and, finally, at terminals 35 when all three of the resistances 38, 39, and 40 are removed and the motor reaches full speed. The core 2 of main solenoid 1 has then come to rest in its highest position, and the rotation of disk 18 of course ceases.

It will be apparent from the foregoing that the first effect of closing switch 41 is to establish current through the motor-field directly to negative terminal and through the motor-armature by way of all of the resistances and that thereafter said resistances are severally cut out until the current passes directly to the armatn re, and it will also be seen that as the current in the motor-armature is thus augmented in strength the strength of magnet 21, and hence the retarding eifect of its field upon the disk 18, is correspondingly increased until the core of main solenoid 1 comes to rest and the motor reaches full running speed.

When it is desired to stop the motor, switch 41 is opened. The core 2 of main solenoid 1 may now fall by its own gravity. It is permitted to do so freely by the opening of ballvalve 4. The pinion 17 now no longer ongages with pawl 19,so that the disk 18 is not retarded. The bar 10 is thus moved to the right of Fig. 1, and all of the cores of the solenoids 26, 2'7, 28, and 29 will drop simultaneously, so that their rollers 30 rest on the lower edge of the slot 11, thus breaking contact at all the contacts 32. The core 2 of main solenoid 1 then comes to rest, its prolongation 6 meeting the elastic cushion 25. If for any reason the parts 31 32 should stick, then the incline o, acting successively on the rollers 30, causes a positive separation at the contact-terminals. Similarly, the circuit-closing action will ordinarily be accomplished by the attraction of the solenoids 26 to 29; but in case of any failure the lower incline p in slot 11 is there to run under the rollers 29 and start the lifting of the cores positively in succession. Thus the inclines p and o of the slot 11 act as cams to start the movement of the cores of the solenoids 26 to 29 up or down in case of any possible sticking. \Vhen any circuit-closing bar 31 opens circuit at its terminals, it is of necessity and positively locked in that position by reason of the engagement of the roller 30 in the narrow part on of the slot in bar 10, and the normal condition of the instrument, which it assumes automatically by reason of the fall of the main solenoid-core when switch 41 is opened, is with circuit broken at all of the terminals 32 to 35.

I claim 1. An electromagnetically-controlled circuit-closer, a device for mechanically preventing the movement of said circuit-closer to close circuit, and electromagnetically-controlled mechanism for actuating said device to permit said circuit-closer to operate.

2. A circuit-closer,a device for locking said circuit-closer in open position, a mechanism for releasing said device and solenoids connected in circuit and respectively controlling said circuit-closer and said locking device; whereby when both solenoids are energized, one first operates to release the locking device and thereby permits the second solenoid to move said circuit'closer to circuit-closing position.

3. A circuit-closer, a solenoid controlling the same, a device for locking said circuitcloser in open position, a second solenoid, and controlled by said second solenoid, mechanism for releasing said locking device and means for positively moving said circuitcloser toward circuit-closing position.

4. A circuit-closer, a solenoid controlling the same, a device for looking said circuitcloser in open position, a second solenoid,and, controlled by said secondsolenoid means constructed and arranged, first, to release said locking device and thereafter positively to move said circuit-closer toward circuit-closing position.

5. In combination with a solenoid and its movable core, a lateral projection on said core, a cam having its controlling edge bearing on said projection and means for moving said cam.

6. In combination with a solenoid and its movable core, alateral projection on said core, an elongated longitudinally-moving cam having its controlling edge bearing on said projection and means for moving said cam in a direction at an angle to the direction of movement of said core.

7. In combination with a solenoid and its movable core, a lateral projection on said core, a circuit-closer carried by said core,a cam having its controlling edge bearing on said projection and means for moving said cam.

8. In combination with a solenoid and its movable core, a lateral projection on said core, a circuit-closer carried by said core,a cam having its controlling edge bearing on said projection and electromagnetic means for moving said cam.

9. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot of different widths receiving said projection, and means for guiding said bar.

10. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot of different widths receiving said projection, means for guiding said bar and a circuit-closer controlled by said core.

11. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an' angle to the direction of movement of said core and having a longitudinal slot receiving said projection, means for guiding said bar, a'circuitcloser carried by said core and a fixed terminal in the path of said circuit-closer; the said slot over a portion of its lengthbeing of a width to receive said projection substantially without clearance and over another portion of its length of width sufficient to permit said core to move said circuit-closer into contact with said terminal.

12. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot receiving said projection and having an edge inclined to the direction of movement of said bar and constructed to meet said projection, and means for guiding said bar,

15. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot receiving said projection and means for guiding said bar; the said slot having parts m, n of different widths and between said parts an edge inclined to the direction of movement of said bar constructed to meet said projection.

14. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot of different widths receiving said projection, means for guiding said bar, and electromagnetic means for moving said bar.

15. In combination with a solenoid and its movable core, a lateral projection on said core, a bar longitudinally movable at an angle to the direction of movement of said core and having a longitudinal slot of different widths receiving said projection, a second solenoid and core, and mechanism for moving said bar interposed between said last-named core and said bar.

16. In combination with a solenoid and its movable core, a body of non-magnetic material actnated by said core and disposed in a magnetic field, and means for varying the strength of said. field proportionately to the extent of movement of said core due to the attraction of said solenoid.

17. In combination with a solenoid and its movable core, a body of non-magnetic material actuated by said core and disposed in a magnetic field.

18. In combination with a solenoid and its movable core, a rotary disk of non-magnetic material disposed in a magnetic field and retated by said core.

19. In combination with a solenoid and its movable core, a body of non-magnetic material actuated by said core and disposed in a magnetic field and means controlled by said solenoid for Varying the strength of said field.

20. In combination with a solenoid and its movable core, a body of non-magnetic material actuated by said core and disposed in a magnetic field and means controlled by said core for varying the strength of said field.

21. The combination of an electric motor, a controlling-solenoid therefor having a movable core, an electromagnet in circuit with said motor and a movable body of non-magnetic material actuated by said core and disposed in the field of said electromagnet.

22. The combination of an electric motor, a controlling-solenoid therefor having a movable core, an electromagnet in circuit with said motor, a disk of non-magnetic material *msis arranged to rotate in the field of said magnet, and mechanism actuated by said core for rotating said disk.

23. A plurality of circuit-closers, a plurality of controlling-solenoids therefor, a device for locking said circuit-closers in open position and means forsuccessively releasing said circuit-closers from said locking device.

24. A plurality of circuit-closers, a plurality of controlling-solenoids therefor, a device for locking said circuit-closers in open position and means for moving said device to release said circuit-closers successively.

25. A plurality of circuit-closers, a plurality of controlling-solenoids therefor, means for locking said circuit-closers in open position, means for successively releasing said circuit-closers from said locking device and means for thereafter mechanically moving each circuit-closer toward circuit-closing position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

7 AUGUST SUNDII.

Witnesses:

I. A. VAN WART, J. Lonson. 

